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1 | |
The kilogram is the metric unit of weight. |
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| | A) | True |
| | B) | False |
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2 | |
The mass of an object on the moon is the same as its mass on earth. |
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| | A) | True |
| | B) | False |
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3 | |
The British unit for mass is the slug. |
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| | A) | True |
| | B) | False |
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4 | |
Newton’s second law of motion is strictly true only in the absence of friction forces. |
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| | A) | True |
| | B) | False |
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5 | |
The mass of a body is dependent on the acceleration due to gravity. |
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| | A) | True |
| | B) | False |
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6 | |
The acceleration an object receives is proportional to the applied force, the constant of proportionality being the reciprocal of its mass. |
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| | A) | True |
| | B) | False |
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7 | |
The weight of an object is equal to the product of its mass and the gravitational acceleration. |
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| | A) | True |
| | B) | False |
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8 | |
Newton’s second law of motion applies either to a system of bodies moved together as a whole or to any body that is a part of such a system. |
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| | A) | True |
| | B) | False |
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9 | |
The weight of a body whose mass is 1 slug is equal to approximately 32 lb. |
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| | A) | True |
| | B) | False |
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10 | |
The weight of a 9.8-kg body is 1 N. |
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| | A) | True |
| | B) | False |
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11 | |
The mass of an 80-lb sled is |
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| | A) | 5 slugs |
| | B) | 2.5 slugs |
| | C) | 2.5 kg |
| | D) | 256 slugs |
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12 | |
The weight of a 10-kg block is |
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| | A) | 98 N |
| | B) | 9.8 N |
| | C) | 10 N |
| | D) | 0.98 N |
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13 | |
What acceleration will a force of 40 N impart to a mass of 5 kg? |
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| | A) | 8 m/s |
| | B) | 200 m/s² |
| | C) | 8 m/s² |
| | D) | 8 cm/s² |
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14 | |
What resultant force will give a 64-lb object an acceleration of 6 ft/s²? |
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| | A) | 384 lb |
| | B) | 10.7 lb |
| | C) | 12 slugs |
| | D) | 12 lb |
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15 | |
When a 1-N force acts on a 1-kg body, the body receives |
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| | A) | an acceleration of 9.8 m/s² |
| | B) | a speed of 1 m/s |
| | C) | an acceleration of 980 m/s² |
| | D) | an acceleration of 1 m/s² |
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16 | |
A force of 20 N gives an object an acceleration of 5 m/s². What force will give the same object an acceleration of 16 m/s²? |
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| | A) | 64 N |
| | B) | 32 N |
| | C) | 4 N |
| | D) | 256 N |
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17 | |
A 10-kg mass is suspended by a rope. What is the acceleration if the tension in the rope is 118 N while the mass is in motion? |
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| | A) | 4 ms/² |
| | B) | 2 m/s² |
| | C) | 11.8 m/s² |
| | D) | 20 m/s² |
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18 | |
A 65-lb body is suspended by a rope and accelerated upward with an acceleration of 8 ft/s². The tension in the rope is approximately |
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| | A) | 96 lb |
| | B) | 16 lb |
| | C) | 81 lb |
| | D) | 48 lb |
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19 | |
The mass m in Fig. 7-2 required to give the system an acceleration of 6 m/s² is approximately
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007301267x/294233/figure72.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (16.0K)</a>]]> |
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| | A) | 31.0 kg |
| | B) | 31.6 kg |
| | C) | 32.6 kg |
| | D) | 41.9 kg |
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20 | |
A 30-kg girl steps to shore from a 60-kg boat, giving the boat an acceleration of 2 m/s². If water resistance is neglected, the girl receives an acceleration of |
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| | A) | -4 ms/² |
| | B) | -15 m/s² |
| | C) | -1 m/s² |
| | D) | -8 m/s² |
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21 | |
The acceleration an object receives is directly proportional to the and inversely proportional to the . |
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22 | |
The mass of a particle is equal to divided by the . |
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23 | |
In USCS units, the mass unit, called a , is derived from the chosen unit of for force. |
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24 | |
In the SI system, the mass unit is the , and the derived unit is the . |
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25 | |
Weight has the same units as the units of . |
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26 | |
In USCS units, the mass of an object is found by dividing its by . |
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27 | |
In the metric system, objects are usually described by giving their . In the USCS, objects are described by giving their . |
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28 | |
is the force of gravitational attraction and is quite dependent
on the . |
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29 | |
If the force is held constant, an increase in produces a proportionate in acceleration. |
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30 | |
If the unit of mass is the kilogram, the unit of force will be the and the unit for acceleration will be . |
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